Liquid transportation with seamless tube length regulation is as follows: the usually

Hot-rolled (extrusion, expanding pipe......... 12000mm 3,000 ~
Cold drawn (rolling) petropipe......... 2000 ~ 10500mm

Liquid transportation with seamless tube bending degree must not be more than specified below:

Wall thickness acuities 15mm............ 1.5 mm/m

Wall thickness > 15mm ~ 30mm...... 2.0 mm/m

Wall thickness 30mm or outer diameter 351mm p >...... 3.0 mm/m